The "Reversing " action is a safety failsafe. If a "Child" (Or otherwise unintelligent Adult for that matter) were to get their head stuck in a closing door, it would be fatal.
If it were to stop dead in its tracks,with no abnormal grinding or screeching noises, you would suspect wiring, stopping accompanied by grinding and screeching, you would suspect motor drive or or broken guides, But reversing direction is only caused by one thing....Mechanical binding.....
On the later models , 08 thru 11, there is a software update to lessen the sensitvity of the door "Failsafe, " but as for 04 ...your on your own...
There is a roller at the top of the sliding door, a roller below the quarter glass, and a hinge/Roller at the bottom.....Make sure they are all generously lubed, and that the rollers still "ROLL" , instead of dragging along.
Chrysler also issued a service bulletin for "Lower Hinges" and "Door Adjustment" but I'm not sure of the years involved at the moment..If all else fails, it may be worth hunting it down for a look..
Professional Mechanic since 1985, Chrysler Dealership Technician since 1999.
We aren't ALL thieves, We're Just trying to make a living like everyone else , So Have A Heart.
If You wanted Dealership Service, You wouldnt Go To "Discount Quik Lube" , So why did you Walk into a dealership Expecting QUIK LUBE PRICING????
Ma'am, It costs so much money, because ...I CAN, And you CANNOT, And It matters Not to Me, Because I HAVE A RIDE HOME.
3/36 Does not mean 3 years and a day, or 36,001